Ar-10

So I'm looking at finally starting my AR-10 project and have run into issues with finding a stripped lower reciever. Not all parts on an AR-10 from one company are compatible with parts from other companies. I am using Parts from Rock River Arms. The problem that I have run into is they dont seem to sell a stripped lower reciever. Does anyone know of any companies that makes these recievers, and sells them stripped, compatible with Rock River Arms Parts?

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Roadkill

September 16, 2011, 04:26 PM

I put a RRA trigger assembly in my DPMS AR10 lower. Works very well.

kimberkid

September 16, 2011, 05:10 PM

If I were to build an AR10 I'd go with the CMMG G3 (http://cmmginc.secure-mall.com/item/CMMG-MK-8-.308-Lower-with-Carbine-Busttstock-1449) receiver with a DPMS upper

Zane

September 16, 2011, 06:22 PM

If I were to build an AR10 I'd go with the CMMG G3 receiver with a DPMS upper

That does demonstrate part of the problem: in order to do that, you have to mill the upper.

For the OP, you may have to buy a complete lower from RRA. The RRA .308 rifles are the least compatible out there.

MovedWest

September 16, 2011, 06:48 PM

JP Enterprises makes a really nice match trigger. If you get one, I'd recommend having a pro install it and dial it into a good pull weight for you. I've got a few of them in various rifles and they're very crisp and consistent.

-MW

Mot45acp

September 17, 2011, 12:07 AM

I don't know how vested you are, but if you plan on building it might be better to sell the RRA parts to offset the cost of a more "builder friendly" rifle.

I too looked at building and found it is cheaper to buy a complete rifle with features that best suit your needs then swap out the parts you want to replace. For me it was the barrel. I wanted chrome lined, and the Armalite douple lapped chrome lined won for me. A Magpul treatment, and suppressor later, I'm a happy camper. All I'm waiting on is a good deal on a Accupoint.

Z-Michigan

September 17, 2011, 12:39 AM

No.

The RRA design is proprietary and not used by anyone else (other than the out of production Bushmaster BAR-10 which was the exact same design, licensed by Bushmaster but eventually abandoned and returned to where it originated at RRA).

Here's what the RRA LAR-8 can share with other AR-10 style rifles:
-trigger group
-plastic handguards (but not FF rails)
-pistol grip
-buttstock

AFAIK, that is IT. It's the worst possible choice for building your own. Also, they sell new for about $1100-1200, and it's nearly impossible to build any .308 AR for less than that much. (DPMS .308s sell as complete rifles for less than you can realistically assemble them yourself for.)

madcratebuilder

September 17, 2011, 07:44 AM

So I'm looking at finally starting my AR-10 project and have run into issues with finding a stripped lower reciever. Not all parts on an AR-10 from one company are compatible with parts from other companies. I am using Parts from Rock River Arms. The problem that I have run into is they dont seem to sell a stripped lower reciever. Does anyone know of any companies that makes these recievers, and sells them stripped, compatible with Rock River Arms Parts?
AR10 is a specific rifle made by ArmaLite and not a generic term for the .308 AR platform.

It is important to use the correct name of the rifle you are planing on building so the correct parts can be recommended.

I would pass on a RRA .308 build. Get a Mega Ten or something that is more main stream.

Zerodefect

September 17, 2011, 11:05 AM

Get an Armalight Ar10 stripped lower. If you want to build an AR10, build a real one.

Plenty of custom upper options for the AR10. Armalite deosn't really offer exactly what I want. So I'd have t build one myself as well.

Go here to see many examples of custom built Ar10's:
http://www.ar15.com/forums/f_3/62_ArmaLite_AR10__andamp__AR180_.html

ugaarguy

September 17, 2011, 01:05 PM

If you want to build an AR10, build a real one.
Which is why you should build a DPMS LR-308 or KAC SR-25 / M110.
http://www.thehighroad.org/showpost.php?p=7495864&postcount=5

TexasPatriot.308

September 17, 2011, 10:44 PM

just get an Armalite AR10 in one of its variations.

toejamm

September 17, 2011, 11:17 PM

Zerodefect and TexasPatriot.308 have got it right. Armalite is the grandaddy of them all. Start there and you will always be able to find parts for your build.

What is your intent for the rifle anyhow?

That may be helpful.

ugaarguy

September 17, 2011, 11:38 PM

Armalite is the grandaddy of them all.
Read the link I posted. The current ArmaLite is nothing but a name. The current AR-10 won't even operate with original AR-10 magazines - but the KAC / DPMS .308 AR rifles will.
Start there and you will always be able to find parts for your build. I have my doubts. UK MOD went with LMT, which is mostly KAC/DPMS compatible. US Army went with KAC. The trend is toward the KAC / DPMS pattern rifles.

AK_Maine_iac

September 18, 2011, 04:11 AM

Armalite does sell them. I own and love my Armalite AR10 a4. The only draw back is they have over sized hinge pins. So you are limited to there product only.
Although i did get a 338 Federal upper for mine. Sweeeeeet moose caliber.

ants

September 18, 2011, 04:42 AM

EP1990, the post by z-michigan covered it for you.

All other posts have interesting sidebar information, none of which helps you,
As far as anwering your actual question. The Internet is funny that way.

As you already know, these rifles are not like the AR15 modular series, where most of the industry is on the same page. For the 308 platform, RRA is probably as different from the rest as possible. It will be very difficult to proceed and succeed, but you may get lucky and find the lower you need. Don't forget about magazines.

Earlier this year I built a current Armalite type and a DPMS type. Both types share some parts with the AR15, so I saved on a few items. The 16" DPMS type with carbine stock cost me $780 to build, the 20" Armalite type with fixed A2 stock cost me $770 to build. Each only has a few Armalite or DPMS parts, most are no-name parts from various suppliers. The 16" is fun to shoot but not accurate at all. The 20" has a genuine Armalite barrel and is quite accurate, and easier to shoot.

Mostly due to the lower, it would cost 50% more to make an RRA clone in either configuration. But you can do it. Be diligent if you want to make that goal.

And please ignore those who tell you just to buy a complete rifle and never look back. They simply don't understand your personal goal, and the value of planning and assembling your own rifle.

AK_Maine_iac

September 18, 2011, 06:32 PM

ANTS:
I agree with you completely. I just wanted to bring the hinge pin size to his attention. Would hate to see someone order something that he can not use. It is better to know before you order. That pertains to anything you order.
The joy of AR platforms is the mix and MATCH of parts.

ants

September 18, 2011, 10:25 PM

Yes, thank you about the pin size.

I hope he goes over to DPMS type. Parts abound.

But all types will be fun to shoot and serve him well.

Z-Michigan

September 18, 2011, 10:53 PM

The DPMS pattern is relatively the easiest to build for, but it's still a whole different ballgame than building an AR-15, where 99% of parts are interchangeable from one brand to another.

If you look at the DPMS pattern, I would look seriously at Mega's MA-Ten receivers, which look terrific. Rainier Arms has those, barrels, and some other parts worth looking at.

However, as someone who has enjoyed building several AR-15s, I really would not bother building a .308 AR right now. Too few choices and no cost benefit. I think you would be better off buying a factory DPMS .308 and then customizing it however you want - you will probably come out ahead financially this way. Or, if you just want the best end product (with a large budget), buy an LMT or Larue .308 and be done with it.

henschman

September 19, 2011, 02:40 PM

If you want to build from a receiver set, I would also go with the Mega MA-Ten. It will actually be a little cheaper than buying a stripped lower and building your own with either the DPMS or Armalite pattern. With the Mega, you can use either DPMS or Armalite pattern barrels and it takes the cheaper DPMS pattern mags. To complete the lower, all you need is a standard AR-15 lower parts kit and a .308 stock kit. Then for the upper, you just need a barrel, barrel nut, and bolt carrier group of your choice.

Either that or buy a complete rifle, if somebody sells one that is set up the way you want.

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